I think you're missing a magic encoding comment. Add this to the top of the file
# encoding: utf-8
Also, a much better way is to use a built-in internationalization api. With it, your code will look like this:
flash[:notice] = I18n.t(:successful_save)
And all your russian strings will be contained within config/locales/ru.yml
and won't cause any troubles in the source code.